ISO 7929:1985 PDF

Information processing — Magnetic disk for data storage devices — 83 000 flux transitions per track, 130 mm (5.12 in) outer diameter, 40 mm (1.57 in) inner diameter

Открыть превью (PDF)

Название (английский):

ISO 7929:1985

Information processing — Magnetic disk for data storage devices — 83 000 flux transitions per track, 130 mm (5.12 in) outer diameter, 40 mm (1.57 in) inner diameter

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 30 мая 1985 г.
Издание:: ISO IS 7929 edition 1 version 1
ICS:: 35.220.21

Язык документа:

ruen

Срок поставки:3 раб. дн. (перевод)

Цена:225 €

Описание (английский):

Specifies mechanical, physical and magnetic characteristics of a lubricated disk of 130 mm (5,12 in) outer diameter and 40 mm (1,57 in) inner diameter to be mounted on data storage devices. Defines requirements for proper performance at 83 332 flux transition per track.

Технические детали

Технический комитет: ISO/IEC JTC 1 - Information technology
SKU: ISO 7929:1985

Abstract

Overview

ISO 7929:1985 specifies the mechanical, physical and magnetic characteristics for a lubricated magnetic disk intended for data storage devices with an outer diameter of 130 mm (5.12 in) and inner diameter 40 mm (1.57 in). The standard defines dimensional tolerances, environmental and handling limits, surface and magnetic requirements, and test methods to ensure satisfactory performance at about 83 000 (document also cites 83 332) flux transitions per track. It targets disks used in rotating head storage systems and includes procedures for reference surfaces and head/disk interaction.

Key topics and technical requirements

Dimensions & geometry
- Outer diameter 130.00 ±0.03 mm, inner diameter 40.000 ±0.05 mm; concentricity, chamfer and clamping-area definitions.
- Magnetic surface radial limits (example: magnetic surfaces typically extend from radii r3 to r4 as specified).
Material & thermal
- Disk material may vary provided dimensional, inertial and functional requirements are met.
- Operating temperature 15–57 °C, storage −40 to 65 °C; avoid condensation and rapid temperature gradients.
- Coefficient of thermal expansion limits and guidance on Imperial/SI unit conversion.
Mechanical performance
- Maximum rotational capability up to 4 000 rpm.
- Moment of inertia limit ≤ 1.43×10−4 kg·m².
- Runout and axial runout limits, velocity and acceleration constraints for stable operation.
Surface & roughness
- Finished magnetic-surface roughness **

Overview

Key topics and technical requirements

Dimensions & geometry
- Outer diameter 130.00 ±0.03 mm, inner diameter 40.000 ±0.05 mm; concentricity, chamfer and clamping-area definitions.
- Magnetic surface radial limits (example: magnetic surfaces typically extend from radii r3 to r4 as specified).
Material & thermal
- Disk material may vary provided dimensional, inertial and functional requirements are met.
- Operating temperature 15–57 °C, storage −40 to 65 °C; avoid condensation and rapid temperature gradients.
- Coefficient of thermal expansion limits and guidance on Imperial/SI unit conversion.
Mechanical performance
- Maximum rotational capability up to 4 000 rpm.
- Moment of inertia limit ≤ 1.43×10−4 kg·m².
- Runout and axial runout limits, velocity and acceleration constraints for stable operation.
Surface & roughness
- Finished magnetic-surface roughness **

ISO 7929:1985 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Похожие стандарты

Anodizing of aluminium and its alloys — Estimation of loss of absorptive power of anodic oxidation coatings a…

Refractory products — Measurement of dimensions and external defects of refractory bricks — Part 1: Dimension…

Information technology — Telecommunications and information exchange between systems — Near Field Communicati…

Infusion equipment for medical use — Part 6: Freeze drying closures for infusion bottles

Information and documentation — International standard serial number (ISSN)

Water quality — General guidance on the enumeration of micro-organisms by culture

Alpine ski-bindings — Lateral release under impact loading — Test method

Sodium hydrogen carbonate for industrial use — Determination of sodium carbonate — Titrimetric method